Slide-carrier for stereopticons.



i l PATENTBD A PR. 11,1905. P c.Lmyromns.y y v SLIDE CARRIER PoR sTEREoPTIcoNs.

APPLIOA'TIQN'HLBD mm1. 1904.

2` smul-SHEET 1.

UNITED STATES Patented April 11, 1905.

PATENT OFFICE.

OF ONE-HALF TO ROBERT CANADA.l

CHAMBERS, OF LINDSAY, ONTARIO,

"SLIDE-CARRIER Fon sTE'nEoPTlcoNs.

SPECIFICATION lforming part of Letters Patent N o. '786,8'83, dated April 11, 1905.

Application filed February 1,1904. Serial No. 191,615.l

To all whom it mar/concern.-

Be it known that L'FREDERIOK CONWAY ED- MoNDs, a' subject of the King of Great Britain, residing at Lindsay, in the Province of Ontario and Dominion of Canada, Vhave invented a new' and useful Slide-Carrier for Stereopticons,of which the following is a specilication.

My invention islan improvement in slidecarriers for use with magic lanterns and similar picture-projecting devices, and has for its object the Apractically instantaneous move-A A furtlmt is to screen said move-f ment of the slides by a shutter acting simultaneously with the movement of the lanternslides.

My invention consists of the novel features of construction and combination of parts here- `inafter described, particularly pointed out in the claims, and shown in the' accompanying drawings, in which- Figure 1 is a perspective view of my improved carrier. Fig. 2 is a plan view, partly in section. Fig. 2a is a detail plan View of the outer end of the slide-carrier. Fig. 3 is aD section on the line 3 3 of Fig. 7. Fig'. A is 'a section on the line 4 4 of'Fig. 2. Fig. 5 is a detail front elevation, partly broken away and showing the shutters ina closed position, the arms and spring parts-'of the carrier being in section. Fig. 6 is a section on the line 6 6 of Fig. 5. Fig. 7 is a detail view showing the front of the carrier with the shutters open, parts being broken away and in section. Fig. 8 is a detailV elevation of a portion of the carrieras seen from the rear, the shutters being closed and the arms being shown in dotted lines. i

In the drawings, A represents aV rectangular narrow casing or slide-carrier cut away in the rear longitudinally and centrally, leaving the upper-and lower vertical iianges A. In the front of the casing is centrally formed a 'rectangular opening A2, approximately the sizeof a standard-sized lantern-slide, the said opening being provided withthe sliding shutters I5, each shutter being adapted to cover 'one-,half of the opening. Arranged in this carrierv are longitudinal vertical ribs C, parallel to and spaced apart from the flanges A', the ribs beingof the same height or width as the flanges A. Secured to each llange A and in alinement ywith the opening A2 arebowshaped springs A3,.their central portions extending adjacentto the ribs C and adapted to hold a lantern-slide firmly against said ribs.

Arranged against one end of the carrier and secured thereto lin any desired manner is a box D, forming a magazine for the lanternslides. The front wall D of the box extends in horizontal alinement with the ribs C, and on the side adjacent the carrier the box is vertically slotted, as at D2, the slot registering with the groove C', in which the lantern-slide moves.

A wire-arched bracket E is arranged on the l rear of the box, and a forwardly-swinging plate E is pivoted tothe top of the bracket,

projectingforwardly and downwardly into the magazine. A -spring E2 continuously presses the plate E forward, advancing the plates placed in the box to the front of the magazine, .whereby one plate or slide is always heldin position to be drawn throughthe slot D2 into the groove C. v

At the oppositel end of the carrier A are arranged two projecting spring-fingers F, adapted to hold a slidewhen it is ejected from the groove C by the entrance of another slide into the said groove. Athnmb-opening G is formed in the front ofthe magazine, and if it is desired to remove the slides from the magazine by lifting them out at the top a thumb or linger can be inserted through the opening G and the slidespressed away from the front wall of the magazine and can then be readily grasped between the thumb and a linger of the other hand and lifted out. ,v A

A longitudinal groove I-I is formed in the front wall of the magazine adjacent the bottom. Through this groove slides a rod H having at its end the spring-catch H2, which engages the rear edge of the slide adjacent the front wall of the magazine.

The shutters B travel in a suitable track B. (Shown in Fig. 3.) Below the shutters is arranged a horizontal slideway B2, and the front wall of this slideway is vertically slotted, as shown at B3. The shutters are beveled on their meeting' edges, making them light-tight, and the following described means are provided for actuating them: Straight arms J are pivoted to the shutters at one end, adjacent the non-beveled edge of the shutters, and extend nearly to the beveled edges. The inner ends of these arms J are pivoted to the upper ends .of slightly-curved arms J which in turn are pivoted at their lower ends to a rod arranged transversely in the slot B3 and adapted to be moved vertically in the said slot. Below the shutters B is arranged a spring J2, coiled on itself and having its ends secured to the rod J3 and adapted to hold the rod in the upper end of the slot B3. c A stop-pin J 'L is arranged at the upper end of the slot and is engaged by the curved arms J. On each side of the slot 'B3 are arranged stop-pins J3. To the inner end of the rod J 3 in the slideway B2 is secured a horizontally-arranged block K,having oppositely-beveled ends K. The shifting bar L works in the slideway B2 and has pivotally connected to its inner end the block L', similar in shape to the block K and beveled like that block. The block L is pivoted to the shifting bar midway the ends of the said block. The outer end of the shifting bar L is formed into a suitable handle and is rigidly connected to the rod H. It is obvious, therefore, that both the rod H and the bar L are moved simultaneously and in the same direction.

The operation of my device is as follows: The lanternslides*say from twenty to thirty in number-are placed in the magazine. rl`he shifting bar L is pressed inward, and the block L passes under the block K. The rod H moves along the lower rib C. As the shifting bar is drawn outward the catch H2 at the inner end of the rod H engages and draws the slide along the groove C and centers :it before the opening A2, the springs A3 holding it into position. As the pivoted block L is drawn outward it rides over the block K, forcing the block down and depressing the rod J3 against the tension of the spring J2, and thus drawing the lower ends of the arms J downward between the stop-pins J3, forcing the arms together and closing the shutters B. As the slide is centered the block L passes out of engagement with the blockK,

and the spring raises the rod J and the shutters are again thrown open. A repetition of this operation will bring into position a new slide, the new slide ejecting the one iirstmentioned from its position in the rear of the opening A2. The ejected slides are finally caught by the fingers F, from which they are removed by the operator.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A device of the kind described, comprising a carrier having longitudinal grooves therein, a magazine at one end of the carrier and vertically slotted on one side in alinement with one of thc grooves, a spring-pressed plate pivoted at the rear of the magazine and adapted to hold a lantern-slide in alinement with said slot, and means for drawing said slide through the slot into and along a groove of the carrier.

2. The combination with a lantern-slir'le carrier, of a magazine secured at the end ol the carrier and opening into the carrier, a bracket on the rear wall of the lnagazine, a plate pivoted at the upper end to the bracket and having its lower end projecting downwardly and forwardly into the magazine, a spring adapted to press said plate forward, the plate being adapted to hold a lantern-slide against the front wall of the magazine and in alinement with said carrier, the said front wall having a horizontal groove on its inner face, and means arranged in the carrier and extending into said groove and adapted to draw the slide from the lnagazine into the carrier.

3. A device of the kind described comprising a carrier, a magazine arranged at one end of the carrier, a rod adapted to engage the slides held in the magazine and move them into the carrier, said carrier having a central opening, shutters adapted to close said opening, a shifting bar connected to the rod and adapted to move in the same direction, pivoted arms carried by the shutters and pivoted at their lower ends to a common rod adapted to move vertically, a beveled block arranged on the said last-mentioned rod, and a block pivoted to the shifting bar and adapted to engage and draw down the block carried by the vertically-movable rod during outward movement of the shifting bar.

FREDERlCK CONWAY llDMUNllS.

W'itnesses:

I. H. STINsoN, JAMES A. PEEL.

IOO 

